Tire casing plug



April 13, 1937. F. ELLIOTT TIRE CASING PLUG Original Filed April 23, 1955 1 Patented Apr. 13, 1937 uurrlaio STATES PATENT orrics Application April 23, 1935, Serial No. 17,843

Renewed February 6, 1937 1 Claim.

My invention relates to a plug for repairing a hole in a pneumatic tire casing, and an important object of the invention is to provide a plug of this character which is self supporting with respect to the casing after it has been installed, arrangements being provided therein to cause the plug to become practically a part of the lining of the casing and of the tread portion of the casing.

Another important object of my invention is to provide in a plug of the character indicated formations and structural arrangements which facilitate applying the plug in a workmanlike manner, the plug being provided with novel inserting means which enables forcibly pulling the plug into place in a hole through the tire casing much smaller than'the plug.

Another important object of my invention is to provide in a plug of the character indicated including a base portion and a neck portion, ribs or grooves which better grip the portions of the casing engaged thereby and provide channels which may be filled with rubber cement or the like for producing adherence of the plug to the casing, and increasing the surface area in contact with the tire casing without increasing the bulk and size of the plug.

Other important objects of my invention will be apparent from a reading of the following description in connection with the drawing, wherein for purposes of illustration I have shown a preferred embodiment of my invention.

In the drawing:-

Figure 1 is a transverse vertical sectional view taken through a tire casing and through an embodiment of the invention.

Figure 2 is a side elevational View of the embodiment.

Figure 3 is a plan View of Figure 2.

Figure 4 is a horizontalsectional view taken through Figure 1 approximately on the line 44.

Referring in detail to the drawing, the numeral 5 generally designates the tire casing and the numeral 6 the tread portion thereof which has on its underside the fabric lining I. The numeral 8 generally designates the hole through the casing which is to be repaired.

The numeral 9 generally designates the embodiment of the invention which includes the neck portion I!) which is passed through the hole 8 in the casing, and the numeral ll generally designates the base of the embodiment which engages the lining or interior of the casing.

The base is a fiat flexible plate of rubber which may have its underside covered with fabric as indicated by the numeral l2 to prevent vulcanization of the tube (not shown) which will contact the inward side thereof. The base II is preferably rectangular in form although it may assume either a round or a polygonal form. The upper surface of the plate II has the corners thereof provided with the diagonal grooves l3 defining triangular areas. Similarly grooved areas l4 located adjacent the corners have the grooves running parallel to the sides of the base, while triangular areas I5 are located to form a square and these are grooved parallel to the grooves of the corner areas l3. From the center of the plate H rises the neck l0 which is generally cylindrical in form and is provided with circumferential grooves l6 which are vertically and regularly spaced. These grooves it are V-shaped in cross section and define the ribs l1. Above the topmost groove Hi the ribs -l'| define the base of a pyramidal top portion l8 which terminates in a flat upper end l9. Transverse intersecting bores 29 and 2! are provided in the uppermost rib I! at the base of the pyramid l8 and wires 22 and 23 are disposed in these bores and the extending ends of these wires are brought together and twisted upon each other as indicated by the numeral 24 to provide the inserting needle for initially entering the plug in the hole in the casing. The upper end of the part 24 is covered with solder as indicated at 25 and provided with a point 26 facilitating entry into the hole to be repaired in the casing.

The device is used by covering the same or selected desired portions thereof with rubber cement and then inserting the same, needle-first in the hole in the casing to be repaired. In order to firmly seat the same in place the needle may be grasped and sufiicient force exerted thereon to firmly seat the plug and adequately engage the plate II with the interior surface of the casing. The plug or that part which extends exteriorly of the casing may then be cut off slightly above that portion of the casing so that the same will wear down level with the exterior of the casing through use of the casing. The jagged edges of the opening to be repaired readily engage with and conform to the irregular contour of the cement covered grooves and ribs of the neck portion lll so that a firm and close knit repair is produced in the hole. Similarly, the roughened surface of the plate ll forms upon use of the tire, a firm and non-slipping vulcanized grip upon the interior of the casing.

Although I have shown and described herein a with the size of the holes to be repaired, said preferred embodiment of my invention, it is to be neck at its outer end being provided with an outdefinitely understood that I do not desire to wardly tapering portion, said neck adjacent the limit the application of the invention thereto, and outwardly tapering portion being provided with 5 y Change 0 c a s ay be made in the matediametrically extending bores, wire members dis- 5 rials and in the structure and arrangement of the posed through the bores and along the tapered parts, within the spirit of the invention and the surface of the tapered portion of the neck, said scope of the subjoined claim. wires being twisted together so that the twisted What is claimed is:- portion binds against the extremity of said ta.-

10 A p for repairing holes n ti ings pered portion, and a. pointed body to which the 10 Comprising a base to engage t te or d outer ends of the wires are attached. of the casing and a neck extending from the base and projecting through and in engagement FRED ELLIO'I'I. 

